1. Department of Internal Medicine, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
2. Department of Public Health and Family Medicine, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
3. Department of Rheumatology, Prince Hamzah Hospital, Amman, Jordan
4. Clinical Research and Development Department, Hikma Pharmaceuticals LLC, Amman, Jordan
5. Johns Hopkins University School of Medicine, Baltimore, Maryland, USA